Liquid Crystal Display Polarity Control Register
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Solution Overview
Problem
Existing liquid crystal displays face degradation in display quality due to biased polarity and common voltage shifts, particularly with problem patterns like alternating white and black data in subpixels or pixels, which requires adaptive polarity pattern adjustments according to the liquid crystal display model, but existing solutions require large-capacity memory.
Innovation Solution
A liquid crystal display system with a register to define polarity pattern information, frame rotation, and line rotation information, and a timing controller to generate polarity control signals for data voltage polarities, allowing adaptive polarity pattern adjustments without additional memory, using source drive ICs to convert data voltages based on these signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed polarity pattern is used to compensate for biased polarity, then display quality degradation is prevented for specific problem patterns, but the solution cannot adapt to changes in pixel array structure or different problem pattern types
Solution Approach 1:
The patent implements dynamic polarity pattern adjustment by allowing the polarity control signals to be modified based on the detected problem pattern type and pixel array structure. The system transitions from a fixed polarity pattern to a dynamic one that can adapt to different display conditions, enabling the same hardware to handle multiple problem pattern types without physical reconfiguration.
2Adaptability or versatility
If additional memory is added to store adaptive polarity pattern information, then adaptability to various problem patterns is improved, but device complexity and cost increase
Solution Approach 1:
The patent employs self-service by utilizing the existing timing controller and register infrastructure to store and process polarity pattern information. Rather than adding dedicated memory, the system leverages available hardware resources, where the timing controller reads stored pattern information and generates appropriate polarity control signals, eliminating the need for additional memory components.
3Reliability
If polarity control signals are adjusted for each problem pattern type, then display quality is maintained across different patterns, but the control system becomes more complex
Solution Approach 1:
The patent applies universality by designing a single polarity control mechanism that can handle multiple problem pattern types. The timing controller uses a unified approach where it reads polarity pattern information from a register and generates appropriate control signals for different patterns (alternating subpixel, alternating pixel, crosstalk check) without requiring separate dedicated control circuits for each pattern type.
Data Source
AI summary
A liquid crystal display and a driving method thereof are provided. The liquid crystal display includes: a liquid crystal display panel including a plurality of data lines, a plurality of gate lines crossing the data lines, and pixels arranged in m×n matrix; a register for defining polarity pattern information, frame rotation information, and line rotation information to determine a polarity of a data voltage charged in N lines, wherein N is a positive integer less than n; a timing controller for generating a polarity control signal to control polarities of data voltages charged in n lines of the liquid crystal display panel based on the information read from the register; and source drive ICs for converting the polarities of the data voltages supplied to the data lines in response to the polarity control signal.